feat: add admission configuration for APISIX Ingress controller

[sakulali]

Related: #289

@tao12345666333 Excuse me, when i choose admission.enabled: true in values.yaml , occur some mistakes as shown below, i found apache/apisix-ingress-controller#1355 seems to resolve the mistakes? Thanks!

1. k8s setup with kind, ubuntu 20.04
2. helm install apisix apisix/apisix --create-namespace --namespace ingress-apisix --set admin.allow.ipList="" --set gateway.type=NodePort
3. helm install apisix-ingress-controller --namespace ingress-apisix --set config.logLevel=debug
4. kubectl run httpbin --image kennethreitz/httpbin --port 80 && kubectl expose pod httpbin --port 80
5. kubectl apply -f httpbin-ingress.yaml
   

[tao12345666333]

When you install APISIX using Helm, please use this command. It will deploy APISIX and APISIX Ingress controller and add some configurations.

helm install apisix apisix/apisix --set ingress-controller.enabled=true --set ingress-controller.config.apisix.serviceNamespace=apisix --namespace apisix --create-namespace --set ingress-controller.config.apisix.serviceName=apisix-admin

[AlinsRan]

This is a cluster level resource.
Multiple controllers may be installed in a cluster, requiring {{. Release. Namespace}} for isolation

[AlinsRan]

Webhook is not yet available, we need to wait for apache/apisix-ingress-controller#1355 merge and release

[sakulali]

Webhook is not yet available, we need to wait for apache/apisix-ingress-controller#1355 merge and release

Sorry for delay, so glad to wait for that feature release, i will sync with that pr if necessary, thanks~

[leowmjw]

@sakulali @AlinsRan Now with webhook available; can this feature be completed? It will be useful for my use case it think

[AlinsRan]

@leowmjw Need to wait for release apisix-ingress-controller:1.7.0

[pcjun97]

Hi @AlinsRan any updates on this feature? The latest version is now 1.8.0